Malicious PDF — malware analysis report

Static analysis result for SHA-256 657f1f50f68be4f6…

MALICIOUS

PDF

34.0 KB Created: 2021-07-06 14:12:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e1dc06998629ff9877b299895cafc8da SHA-1: cd85013f69461fd7d66005d5433fa4b8c71bef63 SHA-256: 657f1f50f68be4f61cf43276da7d314ddeaadeaeed6e0ca459a0143a41a024cc
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, including a known malicious redirector, that promise game hacks and free in-game currency. The document body and heuristics indicate a lure for potentially malicious content, likely leading to malware download or phishing. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/406889139/coin-master-card-hack-2021-game-hack In PDF document text
    • https://miraller.com/upload/files/how-to-get-free-skinss-in-roblox_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/free-robux-quick-and-easy-no-hastle_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/2021-fe-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • https://miraller.com/upload/files/how-to-get-any-item-for-free-robux_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/hacks-for-arsenal-roblox_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/free-robux-no-offers-2021_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • https://miraller.com/upload/files/hellowen-roblox-shirt-free_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • https://miraller.com/upload/files/pokemon-go-free-weekly-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • https://miraller.com/upload/files/roblox-hack-2021-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://miraller.com/upload/files/how-to-get-free-girl-hair-in-roblox_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E3B 22556 bytes
SHA-256: b7e7003e6f05298bb9621c301e541dac5f36a6ce8f7da7c4536fdf91aef9c005
font_01_sfnt_off000060dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DC 18580 bytes
SHA-256: 47e303c72cd5b62bb17ad4e651525e7015df29692984bfa1ae4c9035b919f2a0

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